      &  \multicolumn{2}{c}{log(Markup)}  &  \multicolumn{2}{c}{log(Markup)}    \\     
                    &\multicolumn{1}{c}{Est.}&\multicolumn{1}{c}{S.E.}&\multicolumn{1}{c}{Est.}&\multicolumn{1}{c}{S.E.}\\
 \hline   &&\\   
1(Year$>$1897)*1(Cartel member)&       0.230&       0.075&       0.300&       0.094\\
  &&\\  Mine FE &  \multicolumn{2}{c}{No} & \multicolumn{2}{c}{Yes}  \\ R-squared &  \multicolumn{2}{c}{.023} & \multicolumn{2}{c}{.239}      \\ Observations &  \multicolumn{2}{c}{4705} & \multicolumn{2}{c}{4705}   &&\\  \hline        
